
Pyrellium
The vanilla+ nether overhaul
Screenshots






About this Mod
The Nether has always been dangerous... but it's never been this alive.
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Pyrellium is a content-rich expansion mod that introduces 9 brand new biomes, seamlessly integrated with the vanilla Nether for a natural and immersive experience. Whether you're an explorer, builder, or survivalist, Pyrellium offers new challenges and rewards deep within the fiery realm.
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Flaming Forests
Discover blazing biomes, and obtain new spoils. But watch out, even the flora is out to harm you.

Icy Depths
Find chilling places where frostbite meets fire. These treacherous frozen lands are as beautiful as they are deadly.

Spider Sanctuaries
Venture into eerie caverns where intelligent spiders spin homes of silk and secrets. Tread carefully. You're not alone.

Calming hopes
Not every biome is deadly, venture into the crystal forest to enjoy lands of beauty. and take a break from the danger.

And More!
Click the image below to be taken to
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Forge?
Pyrellium is fully compatible with sinytra connector, use that for playing pyrellium on forge.
Is this compatible with X mod?
Pyrellium was built with compatibility in mind. It works alongside all major Nether mods and fits naturally into both vanilla and modded environments.
Will you be adding more biomes or features?
Pyrellium is currently in beta, this means more features are on the way. Adding more biomes itself will be unlikely, but stay tuned for new mobs, items, and other features.
Hey this looks a lot like Lankasters Nether.
Yes. Pyrellium started as Lankasters Nether, but eventually grew to big to be just a datapack, and it was decided to switch over to making a mod. Lankasters Nether is still available as it's own project for archiving purposes, but it is recommended where possible to use Pyrellium instead.
Available Versions
How to Install Pyrellium on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Pyrellium". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.1, 1.20.2 (+2 more)
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Pyrellium server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Pyrellium compatible with fabric?
Pyrellium officially supports fabric for Minecraft 1.21.11, 1.21.1, 1.20.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Pyrellium – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Pyrellium consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Pyrellium with just one click on your server.